Search for b{yields}u transitions in B{sup -}{yields}D{sup 0}K{sup -} and B{sup -}{yields}D*{sup 0}K{sup -}

Journal Article · Mon Aug 01 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.032004· OSTI ID:20711189

Aubert, B ^[1]

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1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France); and others

We search for B{sup -}{yields}D-tilde{sup 0}K{sup -} and B{sup -}{yields}D-tilde*{sup 0}K{sup -} and charge conjugates. Here the symbol D-tilde{sup 0} indicates decay of a D{sup 0} or D{sup 0} into K{sup +}{pi}{sup -}, while the symbol D-tilde*{sup 0} indicates decay of a D*{sup 0} or D*{sup 0} to D-tilde{sup 0}{pi}{sup 0} or D-tilde{sup 0}{gamma}. These final states can be reached through the b{yields}c transition B{sup -}{yields}D{sup (}*{sup )0}K{sup -} followed by the doubly Cabibbo-Kobayashi-Maskawa (CKM)-suppressed D{sup 0}{yields}K{sup +}{pi}{sup -}, or the b{yields}u transition B{sup -}{yields}D{sup (}*{sup )0}K{sup -} followed by the CKM-favored D{sup 0}{yields}K{sup +}{pi}{sup -}. The interference of these two amplitudes is sensitive to the angle {gamma} of the unitarity triangle. Our results are based on 232x10{sup 6} {upsilon}(4S){yields}BB decays collected with the BABAR detector at SLAC. We find no significant evidence for these decays. We set a limit r{sub B}{identical_to}|A(B{sup -}{yields}D{sup 0}K{sup -})/A(B{sup -}{yields}D{sup 0}K{sup -})|<0.23 at 90% C.L. using the most conservative assumptions on the values of the CKM angle {gamma} and the strong phases in the B and D decay amplitudes. In the case of the D* we set a 90% C.L. limit r{sub B}*{sup 2}{identical_to} vertical bar A(B{sup -}{yields}D*{sup 0}K{sup -})/A(B{sup -}{yields}D*{sup 0}K{sup -}) vertical bar{sup 2}<(0.16){sup 2} which is independent of assumptions on {gamma} and strong phases.

• OSTI ID: 20711189
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MINUS MESONS
B QUARKS
C QUARKS
D NEUTRAL MESONS
D*-2010 MESONS
DECAY AMPLITUDES
HADRONIC PARTICLE DECAY
INTERFERENCE
KAONS MINUS
KAONS PLUS
KOBAYASHI-MASKAWA MATRIX
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PEP STORAGE RINGS
PIONS MINUS
RESONANCE PARTICLES
U QUARKS
UNITARITY